--- parser3/src/include/pa_pool.h	2001/01/27 15:00:04	1.7
+++ parser3/src/include/pa_pool.h	2003/02/14 16:52:21	1.86.2.28
@@ -1,38 +1,384 @@
-/*
-  $Id: pa_pool.h,v 1.7 2001/01/27 15:00:04 paf Exp $
+/** @file
+	Parser: Parser: reference counting classes decls.
+
+	Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
+
+	Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
 */
 
 #ifndef PA_POOL_H
 #define PA_POOL_H
 
-#include <stddef.h>
+static const char* IDENT_POOL_H="$Date: 2003/02/14 16:52:21 $";
+
+// include
+
+#include "pa_config_includes.h"
+
+#ifdef XML
+#	include "gdome.h"
+// for xmlChar
+#	include "libxml/tree.h"
+#endif
+
+// forwards
+
+void *pa_malloc(size_t size);
+void *pa_calloc(size_t size);
+void pa_free(void *ptr);
+void *pa_realloc(void *ptr, size_t size);
+
+class Exception;
+class String;
+class Charset;
+class GdomeDOMString_auto_ptr;
 
-#include "pa_string.h"
-#include "pa_hash.h"
-#include "pa_array.h"
+/* * 
+	Pool mechanizm allows users not to free up allocated memory,
+	leaving that problem to 'pools'.
+
+	@see Pooled
+* /
 
 class Pool {
 public:
-	Pool();
-	~Pool();
-    void *malloc(size_t size);
-    void *calloc(size_t size);
 
-	String *make_string() { 
-		return new(this) String(this);
+	Pool(void *astorage);
+
+	//{@ statistics
+	size_t total_allocated() { return ftotal_allocated; }
+	unsigned int total_times() { return ftotal_times; }
+	//}@
+
+	void set_context(void *acontext) { fcontext=acontext; }
+	void *get_context() { return fcontext; }
+
+	/// allocates some bytes on pool
+	void *malloc(size_t size, int place=0) {
+		return check(real_malloc(size, place), size);
+	}
+	/// allocates some bytes clearing them with zeros
+	void *calloc(size_t size) {
+		return check(real_calloc(size), size);
+	}
+
+	/// registers a routine to clean up non-pooled allocations
+	void register_cleanup(void (*cleanup) (void *), void *data) {
+		if(!real_register_cleanup(cleanup, data))
+			fail_register_cleanup();
+	}
+
+	//{@ helpers
+	void *copy(const void *buf, const size_t size);
+	char *copy(const char* cstr);
+	//}@
+
+	//{@ source charset
+	void set_source_charset(Charset& acharset);
+	Charset& get_source_charset();
+	//}@
+
+	//{@ client charset
+	void set_client_charset(Charset& charset);
+	Charset& get_client_charset();
+	//}@
+
+#ifdef XML
+
+	/// @see Charset::transcode_cstr(xmlChar *s);
+	const char* transcode_cstr(xmlChar *s);
+	/// @see Charset::transcode(xmlChar *s);
+	String& transcode(xmlChar *s
+#ifndef NO_STRING_ORIGIN
+		, const String *origin
+#endif
+		);
+	/// @see Charset::transcode_cstr(GdomeDOMString *s);
+	const char* transcode_cstr(GdomeDOMString *s);
+	/// @see Charset::transcode(GdomeDOMString *s);
+	String& transcode(GdomeDOMString *s
+#ifndef NO_STRING_ORIGIN
+		, const String *origin
+#endif
+		);
+	/// @see Charset::transcode_cstr(const char* buf, size_t buf_size=0);
+	xmlChar *transcode_buf2xchar(const char* buf, size_t buf_size=0);
+	/// @see Charset::transcode(const String& s)
+	GdomeDOMString_auto_ptr transcode(const String& s);
+
+#endif
+
+private:
+
+	void *fstorage;
+	void *fcontext;
+	Charset *source_charset;
+	Charset *client_charset;
+
+private: 
+	
+	//{
+	/// @name implementation defined
+    void *real_malloc(size_t size, int place);
+    void *real_calloc(size_t size);
+	bool real_register_cleanup(void (*cleanup) (void *), void *data);
+	//}
+
+private: 
+
+	/// checks whether mem allocated OK. throws exception otherwise
+	void *check(void *ptr, size_t size) {
+		if(ptr) {
+			ftotal_allocated+=size;
+			ftotal_times++;
+			return ptr;
+		}
+
+		fail_alloc(size);
+
+		// never reached
+		return 0;
+	}
+	/// throws allocation exception
+	void fail_alloc(size_t size) const;
+
+	/// throws register cleanup exception
+	void fail_register_cleanup() const;
+
+private: // statistics
+	
+	size_t ftotal_allocated;
+	unsigned int ftotal_times;
+
+private: //disabled
+
+	Pool(const Pool&);
+	Pool& operator= (const Pool&);
+};
+*/
+
+
+/** 
+	Base for all classes that are allocated in 'pools'.
+
+	Holds Pool object. Contains useful wrappers to it's methods.
+
+	@see NEW
+* /
+
+// all classes that are members parents of packed class [String] 
+// sould be packed also to avoid sparc odd st/lduh problem
+#include "pa_pragma_pack_begin.h"
+class Pooled {
+	// the pool i'm allocated on
+	Pool *fpool;
+public:
+
+	/// the Pooled-sole: Pooled instances can be allocated in Pool rather then on heap
+	static void *operator new(size_t size, Pool& apool) { 
+		return apool.malloc(size, 1);
+	}
+
+	Pooled(Pool& apool) : fpool(&apool) {}
+
+	/// my pool
+	Pool& pool() const { return *fpool; }
+
+	/** used for moving objects from one pool to another. 
+		in between object can have no pool and can not be used
+		@see SQL_Driver_manager
+	* /
+	void set_pool(Pool *apool) { fpool=apool; }
+
+	//{
+	/// @name useful wrapper around pool
+	void *malloc(size_t size, int place=0) const { return fpool->malloc(size, place); }
+	void *calloc(size_t size) const { return fpool->calloc(size); }
+	void register_cleanup(void (*cleanup) (void *), void *data) { fpool->register_cleanup(cleanup, data); }
+	void *copy(const void *buf, const size_t size) { return fpool->copy(buf, size); }
+	char *copy(const char* cstr) { return fpool->copy(cstr); }
+#ifdef XML
+
+	const char* transcode_cstr(GdomeDOMString *s) { return fpool->transcode_cstr(s); }
+	String& transcode(GdomeDOMString *s
+#ifndef NO_STRING_ORIGIN
+		, const String *origin
+#endif
+		) { 
+		return fpool->transcode(s
+#ifndef NO_STRING_ORIGIN
+			, origin
+#endif		
+			); 
+	}
+
+#endif
+	//}
+};
+#include "pa_pragma_pack_end.h"
+/// useful macro for creating objects on current Pooled object Pooled::pool()
+#define NEW new(pool())
+*/
+
+
+template<typename T> class object_ptr {
+	T *ptr;
+public:
+	typedef T element_type;
+
+	explicit object_ptr(T *ptr = 0) {
+		this->ptr=ptr;
+		if(ptr)
+			ptr->ref();
+	}
+	template<class B> object_ptr(const object_ptr<B>& src) {
+		this->ptr=src.get();
+		if(ptr)
+			ptr->ref();
+	}
+	object_ptr(const object_ptr<T>& src) {
+		ptr=src.get();
+		ptr->ref();
+	}
+	object_ptr(T *ptr, int) {
+		this->ptr=ptr;
+	}
+   object_ptr<T>& operator=(const object_ptr<T>& src) {
+		if(this!=&src)
+			if(ptr!=src.get()) {
+				if(ptr)
+					ptr->unref();
+				ptr=src.get();
+				if(ptr)
+					ptr->ref();
+			}
+		return *this;
+	}
+    ~object_ptr() {
+		if(ptr)
+			ptr->unref();
+	}
+    T& operator*() const {
+		return *get();
+	}
+    T *operator->() const {
+		return get();
+	}
+    T *get() const {
+		return ptr;
+	}
+	operator bool() const {
+		return get()!=0;
+	}
+	bool operator !() const {
+		return get()==0;
+	}
+};
+
+#define DECLARE_OBJECT_PTR(name) \
+	typedef object_ptr<name> name##Ptr
+
+//	typedef object_ptr<name> name##Ptr; \
+//	const object_ptr<name> name##PtrZero(0);
+
+/// TEMPLATE CLASS smart_ptr, stolen  from stl:auto_ptr & renamed field/params [not compiled on gcc]
+template<class T>
+	class smart_ptr {
+	bool owns;
+	T *ptr;
+public:
+	typedef T element_type;
+	explicit smart_ptr(T *aptr = 0)
+		: owns(aptr != 0), ptr(aptr) {}
+	smart_ptr(const smart_ptr<T>& src)
+		: owns(src.owns), ptr(src.release()) {}
+	smart_ptr<T>& operator=(const smart_ptr<T>& src)
+		{if (this != &src)
+			{if (ptr != src.get())
+				{if (owns)
+					delete ptr;
+				owns = src.owns; }
+			else if (src.owns)
+				owns = true;
+			ptr = src.release(); }
+		return (*this); }
+	~smart_ptr()
+		{if (owns)
+			delete ptr; }
+	T& operator*() const
+		{return (*get()); }
+	T *get() const
+		{return ptr; }
+	T *release() const
+		{((smart_ptr<T> *)this)->owns = false;
+		return (ptr); }
+	operator bool() const {
+		return get()!=0;
+	}
+	operator T*() const {
+		return ptr;
+	}
+	};
+
+// defines
+
+#define override
+#define rethrow throw
+
+// memory
+
+inline void *operator new[] (size_t size) {
+	return pa_malloc(size);
+}
+inline void operator delete[] (void *ptr) {
+	pa_free(ptr);
+}
+
+class PA_Allocated {
+public:
+	/// the sole: instances allocated using our functions
+	static void *operator new(size_t size) { 
+		return pa_malloc(size);
 	}
-	String *make_string(char *src) {
-		return new(this) String(this, src);
+	static void operator delete(void *ptr) {
+		pa_free(ptr);
 	}
-	Hash *make_hash() {
-		return new(this) Hash(this);
+	static void *malloc(size_t size) {
+		return pa_malloc(size);
 	}
-	Array *make_array() {
-		return new(this) Array(this);
+	static void *calloc(size_t size) {
+		return pa_calloc(size);
+	}
+	static void *realloc(void *ptr, size_t size) {
+		return pa_realloc(ptr, size);
+	}
+
+};
+
+/** 
+	Base for all Parser classes, memory allocation/dallocation goes via pa_malloc/pa_free.
+*/
+class PA_Object: public PA_Allocated {
+	mutable unsigned long freferences;
+public:
+	PA_Object(): freferences(0) {}
+	virtual ~PA_Object() {}
+	 
+	void ref() const {
+		freferences++;
 	}
-	Array *make_array(int initial_rows) {
-		return new(this) Array(this, initial_rows);
+	void unref() const {
+		if(freferences) {
+			if(--freferences==0)
+				delete this;
+		}
 	}
 };
+DECLARE_OBJECT_PTR(PA_Object);
+
+// convinient types
+
+typedef smart_ptr<char> CharPtr;
+//const CharPtr CharPtrZero(0);
 
 #endif